test: more tests for traps and related options

[reubeno]

No description provided.

[github-actions]

Test Results

    3 files     32 suites   15m 15s ⏱️
1 885 tests 1 885 ✅ 0 💤 0 ❌
5 630 runs  5 630 ✅ 0 💤 0 ❌

Results for commit ef6cb69.

♻️ This comment has been updated with latest results.

[github-actions]

Performance Benchmark Report

Benchmark name	Baseline (μs)	Test/PR (μs)	Delta (μs)	Delta %
clone_shell_object	16.93 μs	16.49 μs	-0.44 μs	🟢 -2.62%
eval_arithmetic	0.15 μs	0.15 μs	-0.00 μs	⚪ Unchanged
expand_one_string	1.55 μs	1.57 μs	0.01 μs	⚪ Unchanged
for_loop	22.68 μs	22.42 μs	-0.26 μs	🟢 -1.15%
function_call	2.12 μs	2.19 μs	0.07 μs	⚪ Unchanged
instantiate_shell	52.22 μs	51.70 μs	-0.52 μs	🟢 -1.00%
instantiate_shell_with_init_scripts	24528.83 μs	24638.53 μs	109.70 μs	⚪ Unchanged
parse_bash_completion	2021.88 μs	2026.76 μs	4.88 μs	⚪ Unchanged
parse_sample_script	2.00 μs	1.99 μs	-0.01 μs	⚪ Unchanged
run_echo_builtin_command	15.29 μs	15.15 μs	-0.14 μs	⚪ Unchanged
tokenize_sample_script	3.50 μs	3.43 μs	-0.07 μs	🟢 -1.91%

Code Coverage Report: Only Changed Files listed

Package	Base Coverage	New Coverage	Difference
brush-builtins/src/declare.rs	🟢 85.98%	🟢 86.52%	🟢 0.54%
brush-builtins/src/set.rs	🟢 77.53%	🟢 80.18%	🟢 2.65%
brush-builtins/src/trap.rs	🟢 83.58%	🟢 98.51%	🟢 14.93%
brush-core/src/namedoptions.rs	🟠 74.79%	🟢 75.07%	🟢 0.28%
brush-core/src/results.rs	🟢 79.37%	🟢 80.16%	🟢 0.79%
brush-core/src/traps.rs	🟢 81.25%	🟢 86.46%	🟢 5.21%
brush-core/src/variables.rs	🟢 87.96%	🟢 88.66%	🟢 0.7%
brush-parser/src/ast.rs	🔴 45.09%	🔴 45.21%	🟢 0.12%
brush-parser/src/parser/mod.rs	🟢 100%	🟠 69.64%	🔴 -30.36%
brush-parser/src/parser/peg.rs	🟢 96.16%	🟢 96.44%	🟢 0.28%
brush-test-harness/src/execution.rs	🟢 80.75%	🟢 79.14%	🔴 -1.61%
Overall Coverage	🟢 74.89%	🟢 74.75%	🔴 -0.14%

Minimum allowed coverage is 70%, this run produced 74.75%

Test Summary: bash-completion test suite

Outcome	Count	Percentage
✅ Pass	1559	73.92
❗️ Error	18	0.85
❌ Fail	178	8.44
⏩ Skip	339	16.07
❎ Expected Fail	13	0.62
✔️ Unexpected Pass	2	0.09
📊 Total	2109	100.00

[Copilot]

Pull request overview

This PR significantly expands test coverage for shell traps and related options by adding comprehensive test cases across four test files. The tests document expected bash-compatible behavior for trap handling, with proper annotations for known failures that help track implementation progress.

Changes:

• Added 316 lines of tests for the functrace option (set -T) covering DEBUG and RETURN trap inheritance in functions, subshells, and other contexts
• Added 318 lines of tests for the extdebug shell option covering DEBUG trap return value handling, BASH_ARGC/BASH_ARGV arrays, and declare -F behavior
• Expanded errtrace.yaml from ~100 to 227 lines with additional tests for ERR trap inheritance in subshells, command substitution, pipelines, and nested functions
• Expanded trap.yaml from ~190 to 695 lines with extensive new tests covering trap registration, inheritance patterns across execution contexts, RETURN trap behavior, signal handling, and trap -p edge cases

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated no comments.

File	Description
brush-shell/tests/cases/compat/options/functrace.yaml	New file with 26 test cases covering functrace (-T) option behavior including DEBUG/RETURN trap inheritance in functions, subshells, command substitution, pipelines, and selective function tracing with declare -t
brush-shell/tests/cases/compat/options/extdebug.yaml	New file with 26 test cases for extdebug option including DEBUG trap return value effects (skip/return commands), BASH_ARGC/BASH_ARGV population, declare -F source info, and interaction with other options
brush-shell/tests/cases/compat/options/errtrace.yaml	Expanded with 16 new test cases covering ERR trap inheritance scenarios, reorganized with section comments, renamed one test for clarity, and added comprehensive coverage of pipelines, nested functions, and background jobs
brush-shell/tests/cases/compat/builtins/trap.yaml	Massively expanded with 77 new test cases covering trap -l, comprehensive ERR trap scenarios, subshell/command substitution/pipeline/background job trap inheritance, RETURN trap behavior, signal handling, trap reset/clearing, trap -p edge cases, and DEBUG/EXIT trap advanced scenarios